Alto de Banderas

Overview

Alto de Banderas is a long, high-altitude category-2 climb that trades brutality for endurance. Over 13.9 km it averages 4.81%, gaining a net 670 m as the road lifts from a 2204 m base to a 2874 m summit. On paper the average is friendly, but the arithmetic hides the real story: this is a climb ridden almost entirely above 2200 m, where thin air quietly taxes every pedal stroke. With a max gradient of 8.92%, nothing here is truly savage — instead the challenge is sustaining a steady effort for the better part of an hour while your body fights for oxygen it cannot fully find.

How the Gradient Unfolds

The shape of Banderas is that of a rolling, uneven staircase rather than a single relentless wall. The 4.81% average sits well below the 8.92% maximum, which tells you the steep pitches are isolated spikes surrounded by long stretches of shallower grade. The gap between net elevation gain (670 m) and total ascent (650 m) is small, so there is very little descending mixed in — the road mostly points upward the whole way, with only brief flatter reliefs. Expect the gradient to swing between kicks approaching 9% and softer passages where you can recover, shift up, and carry momentum. Reading the road matters here: hold energy in reserve for the steeper ramps, and use the flatter panels to breathe and reset your rhythm.

Pacing Notes

Because Banderas is long and the altitude compounds fatigue, pacing is everything. Ride it as a sustained tempo effort rather than a series of attacks. A good target is to sit just below your threshold — roughly the power you could hold for the full 13.9 km without blowing up. If you know your FTP, aim to spend most of the climb slightly under it, saving a little headroom for the pitches near 8.92% so they do not spike you into the red. At altitude, your sustainable power drops, so do not chase flatland numbers. If you have never measured your threshold, run the numbers through the FTP estimator before you go, then ride to that ceiling. Keep your cadence smooth and your breathing controlled — the summit at 2874 m punishes anyone who overcooks the lower slopes.

Gearing

Nothing about Banderas demands ultra-compact gearing on its own, but the altitude changes the equation. Thin air saps power, so err toward easier ratios than the 4.81% average would suggest. A compact 34-tooth chainring paired with a 34×32 low gear is a sensible baseline for most riders, giving you a comfortable spin on the pitches nearing 8.92%. If you tend to grind, run tired, or simply want insurance for a long day above 2200 m, step up to a 34×34. That extra sprocket lets you keep your cadence high and your legs fresh across all 13.9 km, which matters far more on a sustained climb than on a short, punchy one.

Summary

Alto de Banderas rewards patience, smart pacing, and respect for altitude. It is not the steepest climb you will meet, but its length and its 2874 m summit make it a genuine test of sustained fitness. Pace it as a tempo effort, gear a touch easier than the average implies, and let the flatter sections carry you.

Length: 13.9 km
Average gradient: 4.81%
Max gradient: 8.92%
Start: 2204 m
Summit: 2874 m
Net gain: 670 m
Total ascent: 650 m
Category: 2